Piston water-meter



(No Model.) 2 Sheets-Sheet 1.

J. A. MOSHER & 0.1VI0MAH0N. PIsToN WATER` METER.

No. 445,070. Patented Jan. 20,1891.

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(No Model.) .2 Sheets-Shet 2 J. A. MOSHER 8u C. MGMAHON. PISTON WATER METER No. 445,070.r Patented Jan. 20, 1891.

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WITNEESEE:

hmmm-HRS NtTE STATES PATENT OFFICE.

JAMES ALLEN MOSHER AND CORMICK llICHAHON, OF BOSTON, MASSACHUSETTS.

PISTON WATER-METER.

SPECIFICATION forming part of Letters Patent No. 445,070, dated January 20, 1891.

Application filed April 29, 1890. Serial No. 349,943. (No model.)

To all whom it may concern.-

Beit known that we, JAMES ALLEN MosHER and CORMICK MCMAHON, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in lVater-llleters, of which the following is a specification.

This invention has for its object to provide a simple, durable, and efficient water-meter of the type in which a reciprocating piston is employed; and it consists in the combination of a cylinder having at each end two portsone an inlet and the other an outlet--a longitudinally-movable rod in said cylinder, supporting at each end two valves, which are adapted to control the ports of the cylinder, a piston which is capable of reciprocating independentlyin said cylinder, weighted levers at the ends of the cylinder, each arranged to impel the rod lengthwise and thereby reverse the positions of the valves, as hereinafter stated, and latches or detents which alternately locl; said rod, so that the rod is first held in one position by the one latch and in the other position by the other latch, and devices arranged to be actuated by the piston as it approaches the ends of its movements to disen gage said latches alternately from the rod, the arrangement being such that when the piston approaches either end of its stroke it causes such a movement of the rod and the valves connected therewith as will reverse the direction of the water and cause the piston to move in the opposite direction, all of which we will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure l represents a plan view and partial horizontal section of our improved meter. Fig. 2 is a section 011 line 2 2 of Fig. l.

The same letters and nulnerals of reference indicate the same parts inboth figures.

In the drawings, a represents the cylinder, the heads of which are provided with inletports h h and outlet-ports c c', each head having one inlet and one outlet port.

CZ represents a valve-carrying rod, which extends lengthwise of the cylinder, and is provided at its ends with cross-heads e e, to which are attached the inlet-valves ff and outlet-valves g g', there being one inlet and one outlet valve to each cross i head, said valves being arranged so that when the rod cl is moved in one direction it will close the inlet-valve and open the outlet-valve, and vice versa. The valves as a whole are arranged so that when the valve b is closed and the valve c open the valve b will be open and the valve c closed, the arrangement being such that whenever one of the inlet-valves is open the outlet-valve at that end of the cylinder will be closed, while at the opposite end of the cylinder the inlet-valve will be closed and the outlet-valve open.

h represents a weighted lever pivoted at t' to a support within the cylinder near one end thereof, and 72, represents a similar lever pivoted at t" to a support within the cylinder at the opposite end thereof. Said levers are caused by their weights j to bear against the ends of the rod d, one lever having a tendency to press said rod endwise in one direction, while the other lever has a tendency to press said rod endwise in the opposite direction.

7.: k represent detents or latches which are pivoted to Iixed supports within the cylinder, at the ends thereof, and are arranged to engage shoulders on vm on the rod d. The latch 7e is arranged to lock the rod CZ against endwise pressure exerted upon it by the lever h', while the latch 7o is arranged to lock said rod against endwise pressure exerted upon it by the lever 7L. The latches are so arranged that only one can engage the corresponding shoulder of the rod at the same time.

It will be seen that when the latch which is engaged with the rod is raised and disengaged therefrom the rod will be moved endwise by the weighted lever at the opposite end. The movement thus given the rod is sufficient to reverse the positions of the valves connected therewith, so that when the rod is moved the inlet-valve which was before open is closed and the otherinlet-valve which was before closed is opened, the same change taking place in the position of the outletvalves, so that each movement of the rod CZ shuts off the admission of water from one end of the cylinder and admits the water to the opposite end, and at the same time so IOS changes the positions of the outlet-valves that Wateris permitted to escaperfrom the end of the cylinder opposite the end at which it is being admitted.

o represents a piston which is fitted to reciprocate in the cylinder a. and to move upon the rod d. Said piston has inclined faces 2 2, which are arranged to strike arms p and p', attached, respectively, to the levers h and h. The piston is moved in the clyinder by the water entering the same, and when it is moving in the direction indicated by the arrow in Fig. 2 its incline 2 strikes "the arm p on the lever 7L, and thereby tilts said lever and causes its upper portion to strike the arm or projection 3 of the latch 7c, thus litting said latch out of engagement with the corresponding shoulderA m and permitting the Weighted lever h at the opposite end of the rod d to move said rod in the direction indicated by said arrow. This movement of the rod changes the position ot' the valves, so that water is admitted to the cylinder at the inlet-port l) and is-caused to impel the piston o `in the opposite direction, the other inletport- ZJ being at the same timecclosed, while the outlet-port c is also closed and the outletport c opened. The piston continues its movement in the direction opposite to that indicated by the arrow till its incline 2 strikes the arm p on the lever h', thereby causing the upper portion of said lever to strike the arm 3 on the latch 7e and raise said latch out of engagement with the shoulder my', whereupon the weighted lever 7L acts to move the rod d in the same direction as the last-described movement of the piston,the positions of the valves being thus again changed, so that the direction of the water is reversed and the piston impelled in the direction indicated by the arrow in Fig. The operation is thus continued, each movement of the piston reversing the valves, and thus causing the reversal of the direction of its own movement. The movements thus imparted to the rod d may be caused to act-nate a suitable train of indicating-wheels placed at any suitable part of the cylinder.

It will be seen that the described apparatus constitutes a simple and durable meter not liable to be easily deranged and capable of accurately measuring a quantity of water passing through the cylinder.

Suitable inlet-passages r conduct water to the inlet-ports b and b', while passages s conduct the water from the outlet-ports c and c.

W'e do not limit ourselves to the rod d as the means for connecting the two pairs of valves so thatthey will move simultaneously, but may use any other suitable means for connecting said valves.

The arms p p are preferably provided with anti-friction rolls u u to bear on the inclines 2 2 of the piston.

W'e claim- 1. In a fluid-meter, the combination of a cylinder having two ports at each end, two pairs of valves, one pair at each end of the cylinder, connections between said valves, whereby they7 are all moved simultaneously, said valves being arranged to open the inlet and close the outlet port and at the same time close the inlet and open the outlet at the opposite end of the cylinder, weighted levers arranged to press in opposite directions onV said series of valves, latches or detents arranged to act alternately in locking the valves against said endwise pressure, and a piston movable in said cylinder and formed to actuate said latches.

2. In a fluid-meter, the combination of a cylinder having two ports at each end,one of said ports being an inlet and the .other an outlet, a rod movable lengthwise of the cylinder, two pairs of valves connected with said rod and arranged, as described, te open the inlet and close the outlet port at one end of the cylinder and at the same time close the inlet and open the outlet port at the opposite end of the cylinder, weighted levers arranged to press in opposite directions on said rod, latches or detents arranged to act alternately in locking the rod against the endwise pressure exerted upon it, and a piston movable in said cylinder and formed to actuate said latches, as set forth.

3. In a duid-meter, the combination of a cylinder having two ports at each end, one of said ports being an inlet and the other an outlet, a rod movable lengthwise of the cylinder, two pairs of valves connected with said rod and arranged, as described, to open the inlet and close the outlet port at one end of the cylinder and at the same time close the inlet and open the outlet port at the opposite end of the cylinder, weighted levers arranged to press in opposite directions on said rod, latches or detents arranged to act alternately in locking the rod against the endwise pressure exerted upon it, and a piston movable in said cylinder and provided with inclines formed to act on and displace said weighted levers, and thereby cause the latter to disengage the latches from the rod, as set forth.v

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, this 23d day of April, A. D. 1890.

Witnesses:

C. F. BROWN, A. D. HARRISON.

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